ABSTRACT Vibration suppression and structural health monitoring are critical for the reliability of lightweight structures in aerospace and industrial applications. However, achieving broadband low‐frequency vibration isolation while simultaneously enabling self‐powered sensing remains a significant challenge. Herein, a self‐sensing, bandgap‐tunable, and multistable metamaterial (STMM) is proposed, featuring a polymer–metal hybrid architecture. Each unit cell integrates auxetic thermoplastic polyurethane (TPU) support strips, thermally actuated bimetallic strips, and a magnetic latching mechanism to achieve four distinct stable configurations. By synergistically manipulating thermal deformation and mechanical preloading, the structure demonstrates exceptional reconfigurability: the starting frequency of the first bandgap can be shifted from 70.5 to 29 Hz—a 59% reduction—providing a continuous tunable bandwidth of up to 425 Hz. Experimental validation on an aluminum beam array confirms on‐demand vibration suppression with peak attenuation reaching −60 dB across diverse frequency regimes (29–481 Hz). Furthermore, a triboelectric nanogenerator (TENG) is seamlessly integrated into the movable top plate, enabling self‐powered excitation monitoring and source localization without external power. This work presents a robust strategy for developing multifunctional, additively manufactured smart structures capable of adaptive vibration control and in situ sensing.
Fu et al. (Wed,) studied this question.